"Easy-to-install NPower Dawn to Dusk Sensor is a convenient, energy-saving unit with light sensor that is compatible for attachment to most barn lights. Automatically activates lights, turning them on as darkness falls and turning them off at first light. Weather Resistant Yes, Overall Dimensions L x W x H in. 7 x 3 x 1 1/2, Indoor/Outdoor Use Indoor/outdoor, Volts 110, Color Black, Watts Up to 60. Black color to match black light fixtures Measures 5 1/2in.H x 4 1/8in. dia. x 1 1/4in. deep at the base"
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